body {
    background-image: url('images/blackhole.png');
    background-size: cover; /* Ensures the image covers the entire screen */
    background-repeat: no-repeat; /* Prevents the image from repeating */
    background-position: center center; /* Centers the image */
    color: #ffffff;
    padding-bottom: 50px; /* Adjust for footer height */
    min-height: 100vh; /* Ensures content extends to at least the height of the viewport */
}

header {
    background-color: #333;
    color: #fff;
    padding: 1rem 0;
    text-align: center;
}

header h1 {
    margin: 0;
    font-size: 2.5rem;
}

nav {
    margin-top: 1rem;
}

nav a {
    color: #ffffff;
    margin: 0 1rem;
    text-decoration: none;
    font-size: 1.2rem;
}

section {
    padding: 2rem;
    text-align: center;
}

/* Semester layout */
.semester {
    display: flex;
    justify-content: space-between;
    margin-bottom: 2rem;
}

.semester div {
    flex: 1;
    padding: 0 1rem;
}

/* Underline for semester titles */
.semester div h3 {
    border-bottom: 1px solid #ffffff;
    padding-bottom: 0.5rem;
    margin-bottom: 1rem;
}

section h2 {
    margin-top: 0;
}



footer {
    background-color: #333;
    color: #fff;
    text-align: center;
    padding: 1rem 0;
    position: fixed;
    bottom: 0;
    width: 100%;
}

footer p {
    margin: 0;
}

#notes {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 2rem;
    padding: 2rem;
    flex-wrap: wrap; /* Ensure it wraps nicely on smaller screens */
}

#notes img {
    width: 200px;
    height: auto;
    border-radius: 50%;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
}

#notes div {
    max-width: 500px; /* Limit the width of the text */
    text-align: left; /* Ensure natural reading flow */
    padding: 1rem;
    line-height: 1.6; /* Improve readability */
}
.container {
    max-width: 1200px; /* Set the maximum width of the page */
    margin: 0 auto; /* Center the container horizontally */
    padding: 0 1rem; /* Add horizontal padding for smaller screens */
}

@media (max-width: 768px) {
    body {
        font-size: 1rem;
    }

    header h1 {
        font-size: 1.8rem;
    }

    nav a {
        font-size: 1rem;
        margin: 0 0.5rem;
    }

    section {
        padding: 1rem;
    }

    #about {
        flex-direction: column; /* Stack content on smaller screens */
        text-align: center; /* Center align for better mobile aesthetics */
    }

    #about div {
        padding: 1rem 0;
    }
}

a:link {
    color: rgb(0, 195, 255); /* Default color for unvisited links */
}

a:visited {
    color: rgb(233, 38, 200); /* Color for visited links */
}


header .header-link:link {
    color: white;
}

header .header-link:visited {
    color: lightgray;
}

header .header-link:hover {
    color: lightblue;
}

header .header-link:active {
    color: darkgray;
}
header .header-link.current {
color: lightblue;
}